Apparatus for measuring liquid fuel



Jan. 31, T928. 1,657,838

A. NAGEL APPARATUS .FOR EASURING LIQUID FUEL Jan. `3, 11928.

1,657,838 A. NAGEL APPARATUS Fon MEASURING LIQUID FUEL Filed sept. e. 1924 4 sheets-sheet 2 Jan. 31, 1928.

A. NAGEL APPARATUS FOR MEASURING LIQUID FUEL Filed Sept. 9. 1924 4 Sheets-Sheet 3 Jari. 31, 192s. 1,657,838

A. NAGEL APPARATUS FOR MEASURING LIQUID FUEL Filed Sept. 9. 1924 4 Sheetsf-Sheet 4 Fig.

Patented Jan. 31, 1928.

UNITED STATES PATENT OFFICE.

AUGUST NAGEL, `OIE STUTTGART, GERMANY.

APPARATUS FOR MEASURIN G LIQUID FUEL.

.Application led September 9, 1924, Serial No. 72.36,?71, and in Germany September 10, 1923.

This invention relates to a device for accurately adjusting the action of the tilting weight which controls the inlet and outlet valve of the measuring 'vessel of 'aliquid measuring apparatus, which tilting weight is caused to tilt alternately either way by a'driving member which is rocked through the rising and falling of the oat. According to the present invention the driving member is provided between its driving pins with yielding stops which at first prevent the Weight tilting after it has passed the dead-centre position, until the yielding stops co-act with fixed adjustable stops and, passing within the path of the arm of the weight, which rests against them cause the weight to tilt over.

A constructional example ofthe invention is shown in the accompanying drawing, Fig. l representing the whole apparatus showing all the parts in the measuring chamber, which is in longitudinal section,

Fig. 2 showing the falling Weight mechanism during the upward movement of the float with the adjusting lever resting on the adjusting pin at the commencement of the rocking movement of the adjusting lever,

Fig. 3 a side view of Fig. 2,

Fi 4 the fallingweight mechanism with 80 the oat in its top position,

Fig. 5 a plan view of Fig. 4.,

Fig. 6 .the gear for controlling the meter mechanism in side elevation and Fig. 7 a plan view of Fig. 6.

In the measuring chamber a is the float b, which is provided with a tubular extension b1, on which there is a rack or the like b2. The float is guided by a tube c, which is connected to' the fuel inlet member d. The fuel inlet valve d1 is plreferably placed low down in the tube c. T e rack b1 turns a pinion e of the falling weight mechanism in a known manner, whereby the motion is transmitted to the toothed wheel e1 on the same shaft and thence to the driving wheel e on'the main shaft f, which is journalled in the frame members g, g1 (Figures 3 and 4). Fixed to the main shaft f is the disc f1 with the ins f2, f, which act as drivers for the weight h, which is mounted loosely on the shaft f. On the same drivlevers z' and lc are a apted to rock. The `said levers are each provided with three operative arms 1,', i and k1, k,.ll1.l The arms il, k1 lying on `either side of the main shaft f are connected together by the spring Z. On the float ,b moving upwards, for instance, on the liquid fuel iiowing into the measuring chamber a, the tube b1 along with the rack o2 willof course take part in this movement. The straight vertical movement of the rack b2 effects a rotation of the pinion e, which meshes with the rack b2,'the motion being transmitted through the toothed wheels el, e2 to the main shaft f of the falling weight mechanism, which turns in the opposite sense. The disc f1 moves in the same direction, as the shaft f, and abuts with its driving pin f2 against one longitudinal side of the lever 11.1 of the weight, the surface h2 of the member h3 being in such a position with respect tothe projecting piece c* on the arm'lc2 of the lever k that, on the weight being brought into its falling position, the lever lc does not release it. Only after the arm les of the lever k has come in contact with the preliminary or coarse adjustment pin m and, through the further rotation of the disc f1 (owing to the continued upward movement of the float), the lever` k is rocked about, its pivot f4, the projecting part la* on the arm k2 will slide along the face h2 of the lever of the falling weight and release the latter. This. will have stressed the spring Z as thev lever arm l remains in contact with the main shaft f, but the lever arm k1 is no longer in contact with the said shaft. The member its on 'the weight lever now slides downwards, strikes against 'the face z* of the member i5, forces the 'arm i2 backwards, while slightly removing the lever arm 'il from the main shaft, and passes under the kmember 'i5 vso that its face L is in contact with the latter. During this lfalling movement the pin h on the .weight lever has come in contact with the toggle joint n (seeFi'g. 4) and will have caused ,the latter to straighten out. As the part nl of the toggle joint is connected to the operating lever "p of the valve rod-work, which is pivotally mounted in the bearing o, the valve rod g will be moved upwards and the valve cone-g1L will be-pressed firmly into the valve seatlng d1, while the cone 2 of the outflow valve will be raised from lts seating 1. Aing disc f1 is a beai'in f, about which the During this operation. of the valves the pin hf on the hollowshaft. connecting the Weight lever h1 to the weight It will have moved `ast a ysliding surface s of a .part s1 (Fig. 6, which is Journalled in the frame los member t and is adapted to rock both ways, and will have forced the part s1 out of its vertical position. This movement will have extended the spring s2 and have compressed the spring sa on the other side, which acts in opposition to it. This balanced spring arrangement has the object of indicating that the measuring vessel a is empty and of showing this by electric transmission by means of a meter. For this purpose a pin s* is provided on the opposite side to the sliding surface s of the part .91, which pin on the part s1 swinging aside moves away from the surface u of the controlling gear u1 of the meter and therefore does not transmit its motion to this gear (see Figs. 6 and 7).

The operation is different, when, owing to the downward movement of the float b, the falling weight mechanism moves in the opposite sense. In this case the disc. f1 rotates in the opposite direction to that shown by the arrow (Fig. 4). The driving pin fs comes in contact with the surface k3 of the weight lever h1 and the pin i7 moves along the sliding surface s of the part 81, forces p1 the latter to one side or causes it to rock, forces the pin s* against the surface u and turns the rodwork operating the meter, whereby the meter is caused to indicate that the measuring chamber is A empty (see Fig; 7

t the same time the disc f1 continues to turn. The weight li. is brought into the other falling position, butv is not released,

as the face h* of the member ha on the weight lever rests against the projection i of the lever until as the lever arm is strikes against the ne adjustment rod-work fv or against the face lv1 of the same. The lever z' is thereupon rocked about the bearing f, the member i, which up to this point has acted as an abutment for the face h of the -member haof the weight lever h1, releases the latter and the weight drops down. In order suitably to regulate this releasing of the falling weight lever, the rodwork o is made vertically adjustable by means of a screw (Fig. l). The same purpose is served by the coarse adjustment pin m already referred to, when the system of levers moves in the opposite direction (Fig. 2). The face it* thereupon slid over the face k on the lever arm k2, pressing the latter backwards and passing under the face c. At the same time the pin `71.1" of the weight h will have acted on the toggle joint 'n in such a manner that the latter has been moved from its extended to its bent position and the changeover 'of the valve has taken lace. The valve g2 will in the meantime ave moved onto its seat and the valve g1 have opened.

As it is exceedingly diicult to e'ect the adjusting of the toggle -joint n, n with respect to the lever p for tilting the valve rodwork, if the pivotal point n2 for the same is made stationary and consequently there is no assurance that the valve member 1 will rest reliably and firmly in the seat 1, and since the toggle joint is intended to prevent the valve'cone gL from lifting off its seat d1 owing to the jolts which may be caused in many ways while the vehicle is in motion, the pivot n2 is controlled by a spring n which is connected at its end n to the pivot n2 and is capable of adjustment by means of an adjusting screw n3.

This makes it possible for the toggle joint on the falling weight h throwing over and the pin L pressing against the part n of the toggle joint, not only to take up its fully stretched position2 but to be bent slightly beyond this position (Fig. 4) and conse quently to make it impossible for the valve cone g1 to lift from its seat d1 through an unintentional backward movement of the toggle joint, even when the pin h with the falling weight moves away again from the toggle joint, a backward movement taking ace. In order to limit the action of the free falling weight h, the toggle joint parts n, 'n.1 are caused to act on each @other by their bearings n2 and ln. being capable of adjustment relatively to one another by means of an adjusting screw or the like, in such a manner that they are kept in their stretched out position whereby they are prevented from automatically coming out from thel said stretched out position.

Since, however it would seein desirable for iXin the delivering .or measuring apparatus or liquid fuel or the like in vehicles and when taking the same out, that the internal works includiii the float mechanism should be protecteil from having the parts shifted with respect to one another or even damaged through rough usag, a rod lw which is adapted to be turned l om the outside by means of a lever is provided with two stop members w1, lwz, one w1, of which projects over the upper surface of the float b and the other, '102, extends over the tiltin weight h.

1. A valve operating device', comprisin a tilting weight, an arm ri idly connecte with lthe tilting weight, a rivin member for tilting the tilting weight, driving pins on the driving member, yielding stops mounted on the driving member projecting between the said driving pins and abutting against the arm rigidly connected with the tilting weight and second stops ca able of being adjusted in a fixed position, t e yielding stops being capable of first reventing the said weight from tilting after it has passed the dead centre position until they come against the said second stops and of lll lll

the driving member, two arms belonging to the two respective levers serving alternately 15 to strike against the second stops Whilst the remainin two arms of the two levers serve temporarily to support the tiltin weight through the intermediary of t e arm rigidly connected with the tilting weight 2o and of the wedge-shaped member on` the latter'arm.

In testimony whereof I have signed my name to this specification.

AUGUST NAGEL. 

